/**
 * 格式化时间
 * @param {String|Number} timestamp 时间戳
 * @returns {String} 格式化后的时间
 */
export function formatTime(timestamp) {
  if (!timestamp) return ''
  
  const date = new Date(timestamp)
  const year = date.getFullYear()
  const month = (date.getMonth() + 1).toString().padStart(2, '0')
  const day = date.getDate().toString().padStart(2, '0')
  const hours = date.getHours().toString().padStart(2, '0')
  const minutes = date.getMinutes().toString().padStart(2, '0')
  
  return `${year}-${month}-${day} ${hours}:${minutes}`
}